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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#pragma once
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>
#include <system_error>
#include <csignal>
#include <cstdio>
#include <functional>
#include <memory>
#include <string>
#ifdef _WIN32
#include "windows.h"
#include "misc_log_ex.h"
#endif
#include "crypto/hash.h"
/*! \brief Various Tools
*
*
*
*/
namespace tools
{
//! Functional class for closing C file handles.
struct close_file
{
void operator()(std::FILE* handle) const noexcept
{
if (handle)
{
std::fclose(handle);
}
}
};
//! A file restricted to process owner AND process. Deletes file on destruction.
class private_file {
std::unique_ptr<std::FILE, close_file> m_handle;
std::string m_filename;
private_file(std::FILE* handle, std::string&& filename) noexcept;
public:
//! `handle() == nullptr && filename.empty()`.
private_file() noexcept;
/*! \return File only readable by owner and only used by this process
OR `private_file{}` on error. */
static private_file create(std::string filename);
private_file(private_file&&) = default;
private_file& operator=(private_file&&) = default;
//! Deletes `filename()` and closes `handle()`.
~private_file() noexcept;
std::FILE* handle() const noexcept { return m_handle.get(); }
const std::string& filename() const noexcept { return m_filename; }
};
/*! \brief Returns the default data directory.
*
* \details Windows < Vista: C:\\Documents and Settings\\Username\\Application Data\\CRYPTONOTE_NAME
*
* Windows >= Vista: C:\\Users\\Username\\AppData\\Roaming\\CRYPTONOTE_NAME
*
* Mac: ~/Library/Application Support/CRYPTONOTE_NAME
*
* Unix: ~/.CRYPTONOTE_NAME
*/
std::string get_default_data_dir();
#ifdef WIN32
/**
* @brief
*
* @param nfolder
* @param iscreate
*
* @return
*/
std::string get_special_folder_path(int nfolder, bool iscreate);
#endif
/*! \brief Returns the OS version string
*
* \details This is a wrapper around the primitives
* get_windows_version_display_string() and
* get_nix_version_display_string()
*/
std::string get_os_version_string();
/*! \brief creates directories for a path
*
* wrapper around boost::filesyste::create_directories.
* (ensure-directory-exists): greenspun's tenth rule in action!
*/
bool create_directories_if_necessary(const std::string& path);
/*! \brief std::rename wrapper for nix and something strange for windows.
*/
std::error_code replace_file(const std::string& replacement_name, const std::string& replaced_name);
bool sanitize_locale();
bool on_startup();
/*! \brief Defines a signal handler for win32 and *nix
*/
class signal_handler
{
public:
/*! \brief installs a signal handler */
template<typename T>
static bool install(T t)
{
#if defined(WIN32)
bool r = TRUE == ::SetConsoleCtrlHandler(&win_handler, TRUE);
if (r)
{
m_handler = t;
}
return r;
#else
/* Only blocks SIGINT, SIGTERM and SIGPIPE */
signal(SIGINT, posix_handler);
signal(SIGTERM, posix_handler);
signal(SIGPIPE, SIG_IGN);
m_handler = t;
return true;
#endif
}
private:
#if defined(WIN32)
/*! \brief Handler for win */
static BOOL WINAPI win_handler(DWORD type)
{
if (CTRL_C_EVENT == type || CTRL_BREAK_EVENT == type)
{
handle_signal(type);
}
else
{
MGINFO_RED("Got control signal " << type << ". Exiting without saving...");
return FALSE;
}
return TRUE;
}
#else
/*! \brief handler for NIX */
static void posix_handler(int type)
{
handle_signal(type);
}
#endif
/*! \brief calles m_handler */
static void handle_signal(int type)
{
static boost::mutex m_mutex;
boost::unique_lock<boost::mutex> lock(m_mutex);
m_handler(type);
}
/*! \brief where the installed handler is stored */
static std::function<void(int)> m_handler;
};
void set_strict_default_file_permissions(bool strict);
void set_max_concurrency(unsigned n);
unsigned get_max_concurrency();
bool is_local_address(const std::string &address);
int vercmp(const char *v0, const char *v1); // returns < 0, 0, > 0, similar to strcmp, but more human friendly than lexical - does not attempt to validate
bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash);
bool sha256sum(const std::string &filename, crypto::hash &hash);
}
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